Ruby 使用puppet解析/etc/hosts的ip和主机名，并将其转换为/etc/sysconfig/network scripts/ifcfg-eth0

我正在踢机器与鞋匠安装红帽6，也把主机名。 我现在正在使用/etc/hosts文件管理我的机器（将来可能会切换到dns），希望让puppet（或任何可以工作的东西）通过/etc/hosts解析并找到我的ip地址和主机名（基于kickstart上cobbler提供的主机名）。诀窍是有些机器在/etc/hosts文件中有多个IP和主机名，例如：

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

#

维护网络

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

#

关闭网络

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

#

主数据网络

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

#

辅助数据网络

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

我需要捕获每个ip和主机名对（一行），并将其转换为/etc/sysconfig/networkscripts/ifcfg eth*（eth1、eth2、eth3……）。Puppet将需要创建尽可能多的ifcfg eth*文件，因为/etc/hosts中有与主机名匹配的文件

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

我只需要将$IP和$hostname附加到ifcfg eth文件中，其余内容都是通用的

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

---

那么，如何使用puppet为“testsrv01”获取4x ifcfg eth文件呢？

puppet非常不适合此任务。这需要一个脚本，Puppet不支持这个脚本。Puppet允许您声明可以在不同平台上移植实施的机器状态

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

对于Shell或Perl脚本来说，该任务足够简单

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

对于Puppet，它需要以下脚本

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

写入自定义事实以检索每个地址/主机名对

设计一个定义的类型来将这样的一对呈现到ethX文件中

您甚至可能需要生成相应的清单，以便为每个地址选择适当的接口索引

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec

从各方面考虑，你不会利用木偶的长处，也不会遭受它的一些弱点

192.168.80.192  testsrv01-maint
192.168.80.193  testsrv02-maint
192.168.80.194  testsrv03-maint

192.168.120.192  testsrv01-ilo
192.168.120.193  testsrv02-ilo
192.168.120.194  testsrv03-ilo

192.168.150.192  testsrv01-pri
192.168.150.193  testsrv02-pri
192.168.150.194  testsrv03-pri

192.168.200.192  testsrv01-sec
192.168.200.193  testsrv02-sec
192.168.200.194  testsrv03-sec